Precautions for smoke alarm

 

Smoke alarm, also known as fire smoke alarm, smoke sensor, etc. It is powered by the bus, and multiple buses can be connected to the bus to form an alarm system by networking and communicating with the fire alarm controller. There is no sound during the alarm, and the host has sound and light prompts. This type of smoke alarm device is generally called smoke detection. Device. Smoke detectors are divided into address codes and those without address codes.

The smoke alarm is composed of two parts: one is an inductive sensor for detecting smoke, and the other is an electronic speaker with a very loud sound, which can alert people in time if danger occurs. The smoke alarm uses the positive and negative ions generated by the ionization of the radioactive source americium to move toward the positive and negative electrodes under the action of the electric field. Under normal circumstances, the current and voltage of the internal and external ionization chambers are stable. Once smoke escapes outside the ionization chamber. Interfering with the normal movement of charged particles, the current and voltage will change, disrupting the balance between the internal and external ionization chambers, so the wireless transmitter sends out a wireless alarm signal to notify the remote receiving host to transmit the alarm information.

1. The smoke alarm is different according to the density of the measured gas, and the orientation of the indoor probe device is probably different. When the measured gas density is less than the air density, the probe should be installed 30cm away from the roof in the downward direction; otherwise, the probe should be installed 30cm above the ground in the upward direction.

2. The probe is mainly a detection element that touches the incineration gas sensor. It is composed of a platinum wire coil coated with alumina and a binder, and its outer surface is attached with platinum, palladium and other metals. Therefore, be careful when installing the device to prevent the probe from being damaged.

3. The device of the open-air probe can choose the height of the device according to the density of the measured gas. Special attention should be paid that the probe should be installed on the disadvantaged side.

4. After commissioning the device, a breathable waterproof cover must be installed to prevent rain from entering the damaged probe.

5. There must be no strong electromagnetic fields (such as high-power motors and transformers) affecting the appearance of the smoke alarm.

6. The smoke alarm is external in appearance and has the function of sound and light. It should be installed in the place where the operator can easily see and hear in order to eliminate hidden dangers in time.

7. The height of the gas detector should normally be 160-170cm, so that the maintenance personnel can carry out normal maintenance.

8. Maintenance sleeves should be added to the connecting cables, and metal hoses should be added at the connection points of the probe, and pay attention to the explosion-proof grade of the factory.